Band-wheel for hand-stamps



J. LANG.

BAN'D WHEEL FOR HAND STAMPS.

APPLICATION FILED mm, 1919.

1,362,329, I Patented Dec. 14, 1920.

- UNITED STATES PATENT OFFICE.

JOHN LANG, OF CHICAGO, ILLINOIS, ASSIGNOR TO ADVANCE MANUFACTURING & SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BAND-WHEEL FOR HAND-STAMPS.

Application filed April 9,

To all whom it may concern:

Be it known that I, JOHN LANG, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Band -Wheels for Hand- Stamps, of which the following is a full. clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to hand stamps such as are employed for dating, numbering, etc, and. more particularly to an improved form of band wheel therefor.

Hand stamps of the above type ordinarily comprise a series of flexible type bearing bands which extend down around a printing bridge at the lower end of the stamp and up over a plurality of band wheels in the upper end of the stamp. These band wheels consist of an advancing disk which is adapted to be manipulated to bring the desired type into printing position. and a hub element on the side of the advancing disk over which the type band extends.

Heretofore, this hub element has consisted of tongues punched out of the side of the advancing disk, or of a spider secured to the side of the advancing disk, over which the type band is supported. This construction is objectionable, principally for the reason that it tends to out the underside of the type hand. These hub elements have also been made up in the form of pliable disks of rubber, cork, or other suitable materials glued or vulcanized to the side of the ad vancing disks. This construction is an improvement inasmuch as the pliable disks or hubs afford the desired degree of friction with the type band without the tendency of cutting the band. Difiiculty, however, has been experienced in successfully securing these pliable hub members to the sides of the metallic advancing disks.

The primary object of my invention is to provide a band wheel, having improved means for securing the hub member to the advancing disks. A secondary object of my invention is to provide a band wheel having a wide bearing engagement with the shaft which supports the band wheel, for the purpose of preventing wabbling of the wheel under the tension of the elastic type band.

Specification of Letters Patent.

Patented Dec. 14, 1920. 1919. Serial No. 288,695.

Another object of my invention is to provide a construction of band wheel which is simple and inexpensive to manufacture.

In the accompanying drawings,

Figure 1 is an enlarged elevational view of a dating stamp illustrating my improved band wheel applied thereto;

Fig. 2 is a front elevational view on the same scale of one of the band wheels;

Fig. 3 is a sectional view taken on the line 33 of Fig. 2;

Fig. A is a sectional view through one of the hub members;

Fig. 5 is an elevational view of the metallie strap previous to bending; and

Fig. 6 is an elevational view of the advance wheel.

The dating stamp 1, which I have illustrated as being representative of band stamps in general, has a handle 2, which is secured in any suitable manner to a band frame 3. The band frame 3 comprises the two side extensions 1-4 which carry a bridge member 5 at their lower ends over which the printing bands track. A pivot pin or shaft 6 passes through holes in the side extensions 4: and supports the band wheels over which the printing bands extend. The band 8, which bears the type designating the months, is relatively wide and rolls upon a wide band wheel 9. The band 11, which bears the type designating the tens of days is relatively narrow and rolls upon a narrow band wheel 9. A spacing washer 10 is interposed between the two narrow band wheels 9--9. Each of the band wheels is provided with the usual advance disks by the manipulation of which the bands are advanced over the bridge 5 to bring the desired type into printing position.

Fig. 2 illustrates one of the narrow band wheels 9 removed from the stamp 1. This band wheel comprises the advance disk 12, the pliable hub member 18, and the strap member 14 for securing the hub member 18 to the side of the disk 12. The disk 12 is stamped out as illustrated in Fig. 6, with two tongues 15-15 struck up from the body of the metal. A hearing hole 16 and the two rectangular slots 17-17 are also punched out of the disk as indicated.

The hub of the band wheel preferably consists of a pliable disk of rubber, cork or any othersuitable material. I preferably employ rubber, or vulcanized rubber and fabric, as it is more durable and has a more efficient frictional engagement with the type bands.-- This pliable disk 18 is pressed between the two laterally projecting tongues 15, which wholly or partly embed themselves in the periphery of the disk. A metallic strap 14 is then extended across the face of the disk 18 and has itsendsbent back and secured in the slots 170f'the advance disk 12.

The-metallic strap'ld isillustrated in Fig. 5, and it will be noted that it is stamped out with two small tongues 21 at the ends-thereof, which are adapted to pass through the slots 17. The ends of the strap are first bent back and the strap isthen placed over the hub 18 so that these end. portions embed in the rubber hub and lie substantially flush with the periphery thereof. The tongues 21 are then crimped or riveted over on the other face of the advance disk 12, as indicated at 22. The strap let is drawn up so that the shoulders formed by the tongues 21 abut the face of the disk 12 and the transverse portion of the strap embeds in the face of the rubber disk 18, in which position the strap is securely held and can function as a bearing extension. It will be noted that thestrap has an enlarged central portion 23 which has a bearing hole 24 adapted for bearing. engagement on the shaft 6. The

rubber disk 18has, of course, a central hole 25 which registers with the bearing hole in the disk 12v and strap 1d. It will be apparent that the bearing-holes in the disk 12 and strap 14 form inv effect a bearing equivalent in width to the. width of the entire band wheel.

The periphery of the advancing disk 12 is serrated as indicated at 26 to provide suit messes her inthe side of said advance disk for carrying a printing band, and a metallic strap having a'hub and two arms extending across the face of said hub member, said metallic strap having its arm secured to said advance disk.

In a hand stamp, a pivotishaft, an ad- Vance diskon said pivdt shaft, a pliable hub member on the side of said advance disk carrying a printing band, a strap extending across the face of said hub. member having a bearing engagement with said pivot shaft and having its ends secured to said advance disk, and tongues projecting from said advance disk engaging the periphery of said hub member.

4-. In a hand stamp, a band. wheel comprising a disk, a hub'member on said. disk, lugs projecting from said disk and embracing the periphery of said hub member, a metallic strap having a hub and two arms extending across the face of said hub member and lying substantially at right angles to said project ing lugs.

In witness whereof I hereunto subscribe my name this 4th day of April, 1919.

JOHN LANG. 

